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Rings and gaps in the disc around Elias 24 revealed by ALMA

Dipierro, G. and Ricci, L. and Pérez, L. M. and Lodato, G. and Alexander, R. D. and Laibe, G. and Andrews, S. and Carpenter, J. M. and Chandler, C. J. and Greaves, J. A. and Hall, C. and Henning, T. and Kwon, W. and Linz, H. and Mundy, L. and Sargent, A. and Tazzari, M. and Testi, L. and Wilner, D. (2018) Rings and gaps in the disc around Elias 24 revealed by ALMA. Monthly Notices of the Royal Astronomical Society, 475 (4). pp. 5296-5312. ISSN 0035-8711. https://resolver.caltech.edu/CaltechAUTHORS:20180418-093906316

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Abstract

We present Atacama Large Millimeter/sub-millimeter Array (ALMA) Cycle 2 observations of the 1.3-mm dust continuum emission of the protoplanetary disc surrounding the T Tauri star Elias 24 with an angular resolution of ∼0.2 arcsec (∼28 au). The dust continuum emission map reveals a dark ring at a radial distance of 0.47 arcsec (∼65 au) from the central star, surrounded by a bright ring at 0.58 arcsec (∼81 au). In the outer disc, the radial intensity profile shows two inflection points at 0.71 and 0.87 arcsec (∼99 and 121 au, respectively). We perform global three-dimensional smoothed particle hydrodynamic gas/dust simulations of discs hosting a migrating and accreting planet. Combining the dust density maps of small and large grains with three-dimensional radiative transfer calculations, we produce synthetic ALMA observations of a variety of disc models in order to reproduce the gap- and ring-like features observed in Elias 24. We find that the dust emission across the disc is consistent with the presence of an embedded planet with a mass of ∼0.7 M_J at an orbital radius of ∼ 60 au. Our model suggests that the two inflection points in the radial intensity profile are due to the inward radial motion of large dust grains from the outer disc. The surface brightness map of our disc model provides a reasonable match to the gap- and ring-like structures observed in Elias 24, with an average discrepancy of ∼5 per cent of the observed fluxes around the gap region.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1093/mnras/sty181DOIArticle
https://arxiv.org/abs/1801.05812arXivDiscussion Paper
ORCID:
AuthorORCID
Pérez, L. M.0000-0002-1199-9564
Carpenter, J. M.0000-0003-2251-0602
Sargent, A.0000-0002-4633-5098
Testi, L.0000-0003-1859-3070
Wilner, D.0000-0003-1526-7587
Additional Information:© 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2018 January 9. Received 2017 December 20; in original form 2017 November 5. We wish to thank Sebastian Stammler for fruitful discussions and acknowledge the referee for constructive comments that improved this manuscript. This paper makes use of the following ALMA data: ADS/JAO.ALMA#2013.1.00498.S. ALMA is a partnership of ESO (representing its member states), NSF (USA), and NINS (Japan), together with NRC (Canada) and NSC and ASIAA (Taiwan) and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO, and NAOJ. This research used the ALICE High Performance Computing Facility at the University of Leicester. Some resources on ALICE form part of the DiRAC Facility jointly funded by STFC and the Large Facilities Capital Fund of BIS. The authors are grateful to C. P. Dullemond for making RADMC-3D available. This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement No 681601). JMC acknowledges support from the National Aeronautics and Space Administration under Grant No. 15XRP15_20140 issued through the Exoplanets Research Program. MT has been supported by the DISCSIM project, grant agreement 341137 funded by the European Research Council under ERC- 2013-ADG. We used SPLASH (Price 2007).
Group:Astronomy Department
Funders:
Funding AgencyGrant Number
European Research Council (ERC)681601
NASA15XRP15_20140
European Research Council (ERC)341137
Subject Keywords:planet–disc interactions, protoplanetary discs, dust, extinction
Issue or Number:4
Record Number:CaltechAUTHORS:20180418-093906316
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180418-093906316
Official Citation:G Dipierro, L Ricci, L Pérez, G Lodato, R D Alexander, G Laibe, S Andrews, J M Carpenter, C J Chandler, J A Greaves, C Hall, T Henning, W Kwon, H Linz, L Mundy, A Sargent, M Tazzari, L Testi, D Wilner; Rings and gaps in the disc around Elias 24 revealed by ALMA, Monthly Notices of the Royal Astronomical Society, Volume 475, Issue 4, 21 April 2018, Pages 5296–5312, https://doi.org/10.1093/mnras/sty181
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85936
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:18 Apr 2018 20:54
Last Modified:22 Nov 2019 23:13

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